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artículo
This article presents a structuralist model for the peruvian economy, which seeks to capture some of its key features, such as the dependence on intermedíate and capital goods, the relative rigidity of the export and agricultural supply, the existence of parastatal input producen and the possibility of financing the production through foreign debt. The model is later used to explain the long-term restrictions to growth, as well as to criticize the economic policy of the Belaunde regime and to present the logic of the heterodox alternative and the reasons of its initial success and later disaster.​
2
artículo
We study a system formed by M dimers through half-filled two-site Hubbard model, with two electrons. Our approach use the third version of Nonextensive Statistical Mechanics as tool for calculating thermodynamic and magnetic parameters such as entropy, internal energy, magnetization and specific heat. In the computer simulations, we vary the q entropic index values between 1 and 2, such that, q = 1.0, 1.4, 1.7 and 2.0. These values are interesting to study small magnetic systems. We find the critical temperature regions in simulations with the simple Hubbard model, i.e. without the intersite interaction. For other side, adding this additional term, we notice an enlargement and shifting of the thermodynamic parameters comparing with the obtained from simple Hubbard model; even more, we found in some cases the absence of the critical temperature regions.
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El objetivo de este trabajo de investigación es que cada oscilación autónoma efectuada en recorrido recto y donde la fuerza oculta es directamente proporcional e inverso de la posición de la masa se le designa oscilaciones armónicas porque acatan una ley simbolizada por la función seno o coseno. Al mismo movimiento se le denomina M.A.S. Téngase presente que un movimiento periódico no es necesariamente oscilatorio y un movimiento oscilatorio no es necesariamente periódico por ejemplo el movimiento de la luna en torno a la tierra es periódico pero no oscilatorio. Estas oscilaciones autónomas son regidas por la labor de las fuerzas internas y valen como modelo de otros fenómenos que acontecen en la naturaleza. Vemos a diario que las comunicación que realizamos los humanos son a través de movimientos oscilatorios que al incurrir el tímpano éste se mueve o vibra. Otro ejemplo ...
4
artículo
We have developed a mathematical model for simulating the behavior of multicomponent mixtures on the single batch distillation using Rayleigh equation which can observe the behavior of components in the distillate and residue.
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artículo
Se ha desarrollado un modelo matemático para simular el comportamiento de mezclas multicomponentes en la destilación discontinua simple utilizando la ecuación de Rayleigh que permite observar el comportamiento de los componentes en el destilado y en el residuo.
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artículo
Currently there is a wide range of software to simulate robotic cell and interact with a process. This article details the procedure to simulate and program a robotic system of classification of items using the software Cosimir Educational. The project includes a window model, positions and programming. Programming is performed using the language Mitsubishi Robot Language (MRL), which is simple but with enough capacity to perform tasks with the robot. This language has commands for movement control, counters, timers, subroutines, loops and incorporates input and output signals.
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artículo
Currently there is a wide range of software to simulate robotic cell and interact with a process. This article details the procedure to simulate and program a robotic system of classification of items using the software Cosimir Educational. The project includes a window model, positions and programming. Programming is performed using the language Mitsubishi Robot Language (MRL), which is simple but with enough capacity to perform tasks with the robot. This language has commands for movement control, counters, timers, subroutines, loops and incorporates input and output signals.
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artículo
GitHub is a platform that provides hosting for software development version control using Git. It features an application programming interface to allow the software to interact with the platform. The enormous quantity of information Hosted in GitHub may be useful to make studies about the current presence of development tools in the open-source software development community. However, the search engine has restrictions that make it impossible to issue complex queries to the platform. In this report, it is described as an object-oriented and extensible solution, named QuantityEr, to obtain the number of search results of complex queries to GitHub by using the inclusion-exclusion principle. The mathematical definitions, as well as related concepts, are presented. The mathematical model is discussed. The application of general design and used development tools are presented. Also, the resu...
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tesis doctoral
Descargue el texto completo en el repositorio institucional de la University of South Florida: https://scholarcommons.usf.edu/etd/5106
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documento de trabajo
Following Varneskov and Perron (2014), I apply the RLS-ARFIMA(0,d,0) and the RLS-ARFIMA (1,d,1) models to the daily stock and Forex market returns volatility of Argentina, Brazil, Chile, Mexico and Peru. It is a parametric state-space model with an estimation framework that combines long memory and level shifts by decomposing the underlying process into a simple mixture model and ARFIMA dynamics. The full sample parameters estimates show that level shifts are rare but they are present in all series. A genuine long-memory component is present in volatility of some countries and the results suggest that the remaining short-memory component is nearly uncorrelated once the level shifts are accounted for. I compare the results with four RLS models as in Xu and Perron (2014) and applied in Rodríguez (2016) for same Latin-American series. An out-of-sample forecasting comparison is also perform...
12
artículo
This paper proposes a simple mathematical model that represents the dynamics of youth play for adolescents from 11 to 18 years. This model is defined by a system of 3 differential equations, which are based on continuous processes. The specification of the classes of our model is based on the group classification of the state of gravity of the problem given in [10]. Then we proceed to find the equilibrium points of the system and its analysis. For our numerical simulation we estimate all the parameters of the model using the research work [6] and we apply the Runge kutta algorithm of order 4. As a result and conclusion it is determined that the problem with the game is endemic among young people. In addition, the prevalence of problems with the game is lower in students aged 15 to 18 than in students aged 11 to 14.
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artículo
The employment problem in Peru raises, payments of more than 80% of workers is worsening. The problem arises historically, because of a slow evolution fed on differents historical phases, mainly structural deficiencies in the national economic system wich has allowed that workers become only a productive factor. Peru must turn to a development process though a strategy base don industrialzation by grow that pursue, besides others, the generation of surtable employment. This article is a summary of the book: “Deterioro y Escasa Retribución al factor trabajo en el Perú: 1990-1997”, published recently by this institution.
14
artículo
El artículo presenta un modelo estructuralista para la economía peruan, que busca captar algunas características especiales de la misma, tales como la dependencia de los bienes intermedios y de capital importados, la relativa rigidez de la oferta de exportaciones tradicionales y de alimentos, la existencia de empresas públicas productoras de insumos y la posibilidad de financiamiento de la pro- ducción vía deuda externa. Posteriormente, este modelo es usado para explicar las restricciones al crecimiento en el largo plazo, así como para criticar la política económica del gobierno de Belaunde y presentar la lógica de la alternativa heterodoxa y las razones de su éxito inicial y posterior desastre.
15
tesis de maestría
Evalúa el Sistema de Manejo Forestal en Fajas (SMFF), introducido de manera experimental en el Valle del Palcazu, en la Selva Alta del Perú, con el propósito de maximizar simultáneamente el uso de biomasa forestal y el bienestar socioeconómico de poblaciones locales. Este sistema representó una experiencia única de manejo forestal en los trópicos y atrajo la atención de la comunidad científica entre fines de la década de los 80 y mediados de los 90. La investigación aplica el análisis costo-beneficio, para lo cual se fundamenta en la incorporación de variables económicas (precios, costos, indicadores de rentabilidad, etc.) al análisis del crecimiento de la biomasa forestal, adaptando a bosques tropicales funciones de crecimiento forestal en bosques templados. La aplicación de principios básicos de economía revela, por un lado, que la rentabilidad del SMFF pudo mejorar ...
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artículo
The basis for transforming the input-output table into a model of reproduction begins by establishing the relationship between the input-output table and Marx's simple and extended models of reproduction.
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tesis de grado
En proyectos de Infraestructura Vial, desarrollado según metodología tradicional de entrega de proyectos Diseño/Licitación/Construcción, los documentos de diseño de ingeniería son elaborados en la etapa de trazo y topografía, por los proyectistas de ingeniería desempeñando un papel muy importante en los proyectos de construcción ya que trasladan la necesidad de los usuarios en informes, planos y especificaciones correspondientes. Estos documentos, al contener toda la información necesaria para la construcción de la vía, sirven de base para los contratos privados o concursos de licitaciones en sus diferentes modalidades en el caso estatal, en el cual se hace su entrega a la empresa que obtiene la buena pro para iniciar la construcción. Este documento debe contar con los diversos estudios de las especialidades, planos, especificaciones precisas sin conflictos y ambigüedades...
18
tesis de grado
Un sistema binario eclipsante está compuesto por 2 estrellas orbitando alrededor del centro de masa y cuyo plano orbital está en dirección del observador, ocurriendo 2 eclipses entre las componentes estelares en cada órbita. El flujo luminoso en un sistema binario depende de diversos parámetros como son las propiedades físicas de cada estrella (masa, radio, luminosidad), del periodo orbital y de algunos parámetros geométricos de modo que al ocurrir un eclipse estelar el flujo luminoso del sistema decae temporalmente. Si conocemos los parámetros de cada componente y del sistema podemos calcular el flujo luminoso del sistema y cómo varía con el tiempo. Esto se conoce como el problema directo. Sin embargo, de mayor interés es el problema inverso que consiste en, conociendo el flujo total de la binaria eclipsante y su variación con el tiempo, obtener los parámetros del sistema....
19
artículo
Original abstract: Sublimation plays a decisive role in the surface energy and mass balance of tropical glaciers. During the dry season (May–September) low specific humidity and high surface roughness favour the direct transition from ice to vapour and drastically reduce the energy available for melting. However, field measurements are scarce and little is known about the performance of sublimation parameterisations in glacier mass balance and runoff models. During 15 days in August 2005 sublimation was measured on the tongue of Glaciar Artesonraju (8°58' S, 77°38' W) in the Cordillera Blanca, Perú, using simple lysimeters. Indicating a strong dependence on surface roughness, daily totals of sublimation range from 1–3 kg m-2 for smooth to 2–5 kg m-2 for rough conditions. (The 15-day means at that time of wind speed and specific humidity were 4.3 m s-1 and 3.8 g kg-1, respectivel...
20
artículo
In food technology, the consistency measurement of many thick or pasty products such as sauces or fruit or vegetable pastes is recorded. The problem in engineering lies in the design and construction of a flow device that allows evaluating the consistency of pasty or thick foods, for which it has actually been reformulated as an empirical flow channel device following the model of the “Bostwick consistometer” through the "Bostwick consistency", which is used by researchers to define technical terms, such as tomato sauce. The objective has been to design and build an instrument, where the thick or pasty food is released into a specially made channel and the distance that the food has slipped after a certain time interval is measured, usually 30 seconds; this gives the thick or pasty food “Bostwick consistency”, for example a tomato puree, B30 (Bostwick 30 seconds) can only be cons...